Shuttle rebound preventer for looms



Feb. 12, 1935. F. B, HOPEWELL SHUTTLE REBOUND PREVENIER FOR LOOMS Filed Jan. 8, 1932 tum xa 2225 Hopewe M ATys.

inver-fior.

f mnK B.

S m. n

PatentedFeh 12, `1935 UNITED STATES N,19991.01t1,fyi l t t SHUTTLE REBOUND PREVENTR FOR` k 1 LOOMS Frank B. Hopewell, Newton, Mass., assigner to K v Frank B. Hopewell,` Newton, Mass.,V trustee;

Helen C. Hopewell executrix` of saidFrank B.

, Hopewell, deceased `Application January 8, `585,416 g sxclaims. (ci. 13e-,187i

' This invention has for its object to' provide means for` preventingfthe rebound of a filling carrier or shuttle toward the center of the loom after it has been projected or picked into the shuttlebox. o 1` H The invention has for its object more particularly to provide such a means in connection with an electro-dynamic means associated with the lling carrier or shuttlefor projecting it across the loom. n y

Theseand other objects and features of the im'fentionwillv appear morefully from the acfcompanying description and drawing and will be particularly pointed outin the claims.

"In the pending application of Bowles and smith, `serial No. 530,716, med Apru. 16, 1931,

there is disclosed an ,electroedynamic' means associated with a filling carrier actingto ,project the filling carrier across the loom and also to check the movement ofY the illing carrier when it is projected intothe shuttle box from the opposite side of the loom,` together with' a i stop forlimiting the movement of the lling` carrier when thus projected into the shuttle box. A preferred form ofhthe present invention "is disclosed herein in connectionwith a form of `apparatus such as disclosed inf-thejaforesaid application, and asthe present invention' has` to` do Withbut` one feature of the loom, it is only necessary here to illustrate and describe thoseffeatures of a preferred form of the broad construction with-which the invention is particularly associated. v

As' the constructionis the same at both sides 'of the loom, it is onlynecessary to` illustrate in detail the construction at yone tion'of the electro-dynamic unit, ailling carrier or shuttle associated therewith inthe shuttle box engaging they st'opytogether'with a construction embodying `a preferred 'form of `the present invention shown in locking position;` l

`Fig. 2 is a view ona larger vscale taken in vertical cross section onthe line`2-"2 of Fig. 1.

Cil

Fig. 3 is a detail inr perspective of a portion of the shuttle box.

Fig. 4 is a diagram `showing the electrical circuits concerned in the operation of the loom.

The electro-dynamic mechanism herein il-` lustrated for projectingthe shuttle `from the box and checking its movement when it arrives in the box is herein shown as operating on the '-Ihel `electro-dyr'iamic` means is energized by'a three-phase alternating current producing a travelingfield and induc-` inductivel principle.`

ing current in an electrically conductive shuttle, with the result that when the velectro-dynamic means -is energized, the shuttle is projected from the box across theloom. When the shuttle is projected from the opposite side of the loom into thebox," theelectro-dynamic means is energized` byf'direct' current, 'which acts to induce current in the electrically conductive shuttleand thus to? check ythe"movement` of the shuttle as it' enters the fieldV of the electro-dynamic means.` In order thatthe shuttle may bechecked ac-Y curatelyjin :the same; position and may notpass outo'f the iield of the electro-dynamic means, a stopis-,provided at the outer'end of the shuttlefbox with which the shuttle` engages and by which its mouvement: is limited. "The, shuttle may,*howeveifrebound yuponv striking such a o stop and thus be mispositioned in" the shuttle let boxor leven rebound `to"`afposlition" toward the centerof ythe `loorn more or lessoutof the effec;- t'ive iield of jthefelectrof-dynamic lmeans.

lThe present invention `provides means for pre-iA vveiitin'g"this rebound of theshuttle and speciffl 1 ic'allyfor locking itagainstrebound Lfrom its positit'm las limited by the stop. While the meansjror'f preventing rebound is particularly designed for use in connection with an'electro` dynamic means for projectingpand clleckingthe` movementoi the shuttle, it -is of broader appl'ication. The means specicallydisclosedffor embodying the invention is shown' as ,an electrically controlled device or. still more specif ically as a solenoidpthe core"`ojf"which`in combin'ato` with" a recessin the `shuttle wall 'acts` toilock the shuttle against rebound and in which thesolenoid is energized intimed` relation with the electro-dynamic means to withdraw the core froml lengagementv with theshuttle when or just before the` electro-dynamic means is energized to project the shuttlefrom the box.

'Aipreferrediconstruction is illustratedyat the `lefthand sideof the 4lay.

The bottom of the shuttle Vbox isshown asa race plate 1 onrthe i lay 2, the rear wall 3 extends upward `from" the` lay andthe fronltwall is constituted by `oneof the coresectionsd` ofthe electro-dynamic unit which comprises these `core,sections and the coilsV `5,"all*`asullyfdisclosedyin the aforesaid Bowles and Smith application.' The shuttle 6 is shown in the:shuttle. box and as comprisinga laterally projecting, electrically conductive metali `iln 7.

which extends between the core-sections 4l..` VThe` cuter; end of the shuttle box isV provided with lahood V8' secured at 9 tothe rearwall 3 and open 'at' tlf1`e-front` This `hood has mounted therein f atthc outer end :a stop gate l0V hinged at 11` to. swing` `inwardly but' limited in its outward movement vby the hood, and this stop gate is provided 4with layers of rawhide or suitable ma-l .terialf 1&2 againstwhichvthe nose of the shuttlel engages when itreaches the limit of its move!` from the opposite side of the loom. y

The rear wall 13 of the kshuttle is provided near each end with a recess 14 and this recess ispreferably formed in a hard metal wear plate- 15 inserted in the wall of the shuttle.

The solenoid is secured to the rear wall 3.0i

the shuttle box inv position for the core of the solenoid to cooperate with the recess 14 adjacent the outer end of the shuttle. This vsolenoid is enclosed by a casing v16 attached at 17 to the rear wall` 3. The base 18ct the casing extends through the rear'wall-.Sv of ithe shuttle box. The armature 19 is mounted in the outer end of the casing and the core 20 is guided at its rear end in the armature and at its forward end in the base 18. This core at its forward end is bevelled at 21 so that as the shuttle entersthe box and engages the bevelled end; of thev core, the core is forced backward, but when the core is @in its forward position, ity seats in the` recess 14 engaging the outer Wall thereof and thus locks or latches the vshuttle against movement toward the center of the loom. The core is projected forward by a helical spring 22 seated in the base of the lcasing betweenfa shoulder 23 on the core and a screw plug 24.

Intheoperation of this form of theV invention, .when the lshuttle isprojected into the box and nears the end of its movement, it pushes back the coreof the solenoid and when the nose of the shuttle engages the stop, the core of the solenoid snapsrinto the recess leeand locks the shuttle at the vend of its movement against rebound. When the electro-dynamic unit is energized to project the shuttle out ofthe box, the solenoid iss-energized to withdraw the core 1 from engagement with the recess in the shuttle,

hand sides of the loom, respectively.

the energization of the solenoid preferably tak--` ing place slightly in` advanceof the energization of :the electro-dynamic unit'.

InFig. 4 there is illustrated diagrammatically the' mechanisms involved, together with al simple form of electrical circuits and means for controlling the supply of current to the mechanisms in proper timed relation. A three-phase alternating current is shown for energizing the electrodynamic units at the opposite sides of the loom for projecting the shuttle from the respective boxes; a direct current for energizing the electro-,dynamic unitsat the opposite .sides of the loom for checking the movement of the shuttle when` projected into the respective boxes; and the same direct current for energizing the solenoids at the opposite sides of the loomto unlock or release the shuttle when the respective kelectro-dynamic unit is energized by the alternating current to project the shuttle` The various circuits extend to.

from Ythe box. y switches indicated as S1` and S2 for the solenoids at thefleft and` right-hand sides of the loom, respectively, A1 and' A2 for the control of the ltl'rree-phase alternating current for the electro-dynamic units at the left and righthand sides of the loom, respectively, and D1 and D2 for the control of the direct current for the electro-dynamic units at the left and Vright-- These switches are controlled in proper timed relation 'by Acams 25 onva camshaft 26 mounted above the switches and driven by a suitable operating element ofv 'theloo1n, as disclosed in the aforesaid Bowles and Smith application. The system lthus disclosedin connection with Fig. 4 is, howe t trolled device, such as the solenoid, in which a vsimple and preferred form of the invention in its v more specific.l aspects is embodied.

It'will thus be seen that a very effective means is provided for preventing or limiting the re-` bound of the shuttle when projected into the box and its movement has been limited as by the stop. Preferably the locking or latchingmeans such as the solenoid core 20 and the recess llare solocated as to prevent any rebound, but the location may be such as to limit the rebound to any desired extent depending upon the relation between the distanceA from the core to the stop and the distance from, the recess to the nosevo' the shuttle. .The-position of the cams 25` onthe cam shaft also determine the exact period at which the core shall be withdrawn from 'the recess. in the shuttle relatively to thev energization Y of the electro-dynamic means for .projecting the shuttle fromthe box. `It, is to .be understood that in its broader application the invention is not limited to the particular means employed for controlling'the operation of the means for preventing the re bound of the shuttlenot tothe associationofV the rebound preventingmeans with an electrof dynamic means for projecting and checking the iilling carrier nor otherwise than Vvas set forth in the claims.

Having thus described the invention, what is claimed as new, and Lettersv Patent, is: s y l1. In a loom, a shuttle having a recess inA its wall, a shuttleA box, a solenoid mounted on the shuttle box with its core yieldinglyl forced -toward the shuttle as the shuttle enters the box and acting to engage in said recess and to' lock the shuttle against rebound when the shuttle lof ktheshuttle` when projected into the box, a

solenoid mounted on the shuttle box with its ycore yieldingly forced toward the shuttleas the shuttle enters thebox and acting-*to engage in said recess and lock the-shuttle against rebound from the stop, and means acting to energize the desired to be secured by solenoid and vithdraw` the core from the shuttle when or before the electro-dynamic means acts tovproject the shuttle from the box.

3. In a loom, a shuttle box, a` shuttle having a recess in its wall, electro-dynamic means asso-` ciatedr with the shuttle to project the shuttle from the box, a stopsor iimiting thernovement of the shuttle when projected intofthe box, a solenoid mounted on the shuttle box with its core yieldingly forced toward the shuttle asA the shuttle enters the boxV and acting to engage in said recess and lock the shuttle against rebound k,from the stop, andl current controlling means for the electro-dynamic means andfor the sole noid acting to effect the energization rst of the solenoid to withdraw the core from the shuttle and then ofthe electro-dynamic means to project the shuttle i'rom the box FRANK B. HOPEWELL. 

